Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?
Schema description coverage is 100%, with each parameter having a short description (e.g., 'Chain filter.', 'Rows; default 20, max 400.'). The tool description adds little beyond the schema, except a cryptic note that pool_type 'maps to ES exposure' which may confuse rather than clarify. Since the schema already carries most semantic weight, a baseline of 3 is appropriate; the description does not meaningfully enrich parameter understanding.
Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.